Re: Thanks Mariss/Where are you!

Mariss,

Good points, and good to listen to the "suits". I think you've
answered your own "questions" by simply incorporating the whole thing
in a bigger box.

That's what the "other" name-brand 160V drives do (just add IEC
cordset and go) and they have high-paid "suits" advising them also :-)

Seems it wouldn't be that tough to spec a housing and get an assembly
shop to "integrate" the thing(s) for ya...

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Paul,
>
> Of course an isolation transformer would be safer. However human
> nature is such that some would consider it a needless expense; I
know
> I would were I in that situation.
>
> Most of the ones that would dispense with it would know the
> difference between the black, white and green wires but some would
> not.
>
> The only way to have some control over the consequences would
require
> the power supply, cableing, encoder and motor be integrated with
the
> drive. Maybe I will do that sometime in the future.
>
> I have a 160VDC prototype of the G320 that I occasionally run for
my
> own amusement and it works very well indeed. However our lawyers
> warned us off from putting it in production for the previously
> mentioned reasons. We pay them the big bucks to see problems I
cannot
> and they earned their money on that one.
>
> It disgusts me because it works so well (no xformer).
>
> Mariss
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "sprooney797" <prooney797@a...> wrote:
> >
> >
> > Mariss Wrote:
> > > (3) Sure as God made little green apples someone will run it
off
> of
> > > rectified 115VAC, kill himself and more lawyers will become
rich
> at
> > > my expense.
> >
> > Mariss, running from a rectified 115vac source sounds very
> appealing,
> > and I must admit that is why I would like a drive that is rated to
> > handle the higher voltage.
> >
> > If the circuit is properly grounded and fused, where is the
danger
> in
> > doing this? I believe many of the industrial servo drives work
off
> of
> > a rectified AC source.
> >
> > Would the use of an isolation transformer make it any safer?
> >
> > Or is the risk because of the use of home-made cables and cobbled
up
> > control boxes?
> >
> > Just curious as I'd love to do away with the large DC power
> supplies.
> >
> > Sincerely,
> >
> > Paul Rooney
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...>
wrote:
> > > Eric,
> > >
> > > Couple of problems with a 160VDC rating:
> > >
> > > (1) The drive becomes larger and more expensive.
> > > (2) The market for that class drive is much smaller.
> > > (3) Sure as God made little green apples someone will run it
off
> of
> > > rectified 115VAC, kill himself and more lawyers will become
rich
> at
> > > my expense.
> > >
> > > The ethernet cores are interesting but they are a little more
> > > expensive and I don't know what the CPU overhead will be to use
> > > ethernet. I am writing the stuff in assembly because every
> > > microsecond counts.
> > >
> > > I've got the point-to-point, linear interpolation and circular
> > > interpolation algorithms worked out. The point-to-point one is
> > > written up and running already, so I am just about 1% finished
> with
> > > the project.
> > >
> > > Mariss
> > >
> > > --- In CAD_CAM_EDM_DRO@y..., "unterhausen" <unterhausen@y...>
> wrote:
> > > >
> > > > Mariss,
> > > > Just don't buy any of the rcm2300 ethernet rabbitcores, ok?
> Darn
> > > > things are really hard to get right now. I keep wondering
why
> the
> > > > voltage on your drives are so low. I would own some 320's
> right
> > > now
> > > > if the voltage went to 150 or so. Are you thinking about
going
> > > > higher with the brushless amps?
> > > > Eric